Karthika Puranam Day 4

A childless king of Panchala, advised by Sage Pippalada, lights lamps at a Shiva temple through Karthika and is blessed with a son, Shatruji.

Shatruji grows up wayward and pursues a Brahmin's wife. On a Karthika Pournami that falls on a Monday, at his request she twists the end of her sari into a wick and lights a castor-oil lamp at a Shiva temple. Her husband, lying in wait, kills them both and then himself. Because of that lamp, Shiva's messengers take the lovers to Kailasa — and with a share of its merit, the husband goes with them.